Thin material drilling technique.
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Previously:
https://www.homemadetools.net/forum/...567#post225446
https://www.homemadetools.net/forum/...703#post223368
https://www.homemadetools.net/forum/...760#post223516
https://www.homemadetools.net/forum/...814#post210042
https://www.homemadetools.net/forum/...596#post209277
